<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8'/>
    <title></title>
    <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no'/>
    <script src='../assets/mapbox-gl-dev.js'></script>
    <link href='../assets/mapbox-gl.css' rel='stylesheet'/>
    <style>
        body {
            margin: 0;
            padding: 0;
        }

        #map {
            position: absolute;
            top: 0;
            bottom: 0;
            width: 100%;
        }
    </style>
</head>
<body>

<div id='map'></div>
<script>
    mapboxgl.accessToken = 'pk.eyJ1IjoibWFvcmV5IiwiYSI6ImNqNWhrenIwcDFvbXUyd3I2bTJxYzZ4em8ifQ.KHZIehQuWW9AsMaGtATdwA';
    var map = new mapboxgl.Map({
        container: 'map',
        style: 'mapbox://styles/mapbox/dark-v9',
        maxZoom: 5.99,
        minZoom: 4,
        zoom: 5,
        center: [-75.789, 41.874]
    });

    map.on('load', function () {

        var frameCount = 5;
        for (var i = 0; i < frameCount; i++) {

            map.addLayer({
                id: 'radar' + i,
                source: {
                    type: 'image',
                    url: '/mapbox-lg/assets/images/radar' + i + '.gif',
                    coordinates: [
                        [-80.425, 46.437],
                        [-71.516, 46.437],
                        [-71.516, 37.936],
                        [-80.425, 37.936]
                    ]
                },
                type: 'raster',
                paint: {
                    'raster-opacity': 0,
                    'raster-opacity-transition': {
                        duration: 0
                    }
                }
            });
        }

        var frame = frameCount - 1;
        setInterval(function () {
            map.setPaintProperty('radar' + frame, 'raster-opacity', 0);
            frame = (frame + 1) % frameCount;
            map.setPaintProperty('radar' + frame, 'raster-opacity', 1);
        }, 500);

        // function animateMarker(timestamp) {
        //     console.log(timestamp)
        //     map.setPaintProperty('radar' + parseInt(timestamp % 5), 'raster-opacity', parseInt(timestamp % 2));
        //     requestAnimationFrame(animateMarker);
        // }
        // Start the animation.
        //animateMarker(0);
    });
</script>

</body>
</html>